The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 1989
Filed:
May. 05, 1988
Hitachi, Ltd., Tokyo, JP;
Abstract
A multiple throttle mechanism comprises a pair of intake manifold blocks separated from each other and each having two or more parallel passages formed therethrough and a wall portion separating thereby the adjacent parallel passages, the parallel passages each being a part of each of the intake manifold passages communicating with respective engine cylinders, and a pair of throttle shafts arranged in an axial direction, each crossing the parallel passages, passing through a through hole formed in the wall portion of the intake manifold block and supported on the intake manifold block, the throttle valves being mounted on the throttle shafts so that the throttle valves are operated simultaneously to control the cross sectional area of each of the parallel passage. The multiple throttle mechanism further comprises air gaps formed between an inner circumference of the through holes and an outer circumference of the shafts to provide an initial air flow.